diff --git a/tests/hermes_cli/test_update_head_moved_gate.py b/tests/hermes_cli/test_update_head_moved_gate.py
index 34d83a3845..d72a8476a0 100644
--- a/tests/hermes_cli/test_update_head_moved_gate.py
+++ b/tests/hermes_cli/test_update_head_moved_gate.py
@@ -105,7 +105,7 @@ def _patch_update_deps(monkeypatch, tmp_path, run_side_effect):
     monkeypatch.setattr(hermes_main, "_write_update_incomplete_marker", lambda: None)
     monkeypatch.setattr(hermes_main, "_clear_update_incomplete_marker", lambda: None)
     # Gateway restart path (called after a successful update).
-    monkeypatch.setattr(update_cmd, "_finish_dashboard_update_cleanup", lambda *a: None)
+    monkeypatch.setattr(update_cmd, "_finish_dashboard_update_cleanup", lambda *a, **k: None)
     # Keep the (now surfaced — #78574) gateway auto-restart phase away from
     # this machine's real gateways: discovery returns nothing, systemd is
     # unsupported, so the phase is a clean no-op for both snapshots.